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mlx4_core: Pass an invalid PCI id number to VFs

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Currently, VFs have 0 in their dev->caps.function field.  This is a
valid pci id (usually of the PF).  Instead, pass an invalid PCI id to
the VF via QUERY_FW, so that if the value gets accessed in the VF
driver, we'll catch the problem.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Jack Morgenstein 2012-06-19 11:21:33 +03:00 committed by Roland Dreier
parent 6887a4131d
commit 752a50cab6
2 changed files with 9 additions and 3 deletions
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10
drivers/net/ethernet/mellanox/mlx4/fw.c
View file

@ -881,11 +881,12 @@ int mlx4_QUERY_FW(struct mlx4_dev *dev)
((fw_ver & 0xffff0000ull) >> 16) |
((fw_ver & 0x0000ffffull) << 16);
MLX4_GET(lg, outbox, QUERY_FW_PPF_ID);
dev->caps.function = lg;
if (mlx4_is_slave(dev))
goto out;
MLX4_GET(lg, outbox, QUERY_FW_PPF_ID);
dev->caps.function = lg;
MLX4_GET(cmd_if_rev, outbox, QUERY_FW_CMD_IF_REV_OFFSET);
if (cmd_if_rev < MLX4_COMMAND_INTERFACE_MIN_REV ||
@ -966,9 +967,12 @@ int mlx4_QUERY_FW_wrapper(struct mlx4_dev *dev, int slave,
if (err)
return err;
/* for slaves, zero out everything except FW version */
/* for slaves, set pci PPF ID to invalid and zero out everything
* else except FW version */
outbuf[0] = outbuf[1] = 0;
memset(&outbuf[8], 0, QUERY_FW_OUT_SIZE - 8);
outbuf[QUERY_FW_PPF_ID] = MLX4_INVALID_SLAVE_ID;
return 0;
}

2
include/linux/mlx4/device.h
View file

@ -534,6 +534,8 @@ struct mlx4_init_port_param {
if (((dev)->caps.port_mask[port] == MLX4_PORT_TYPE_IB) || \
((dev)->caps.flags & MLX4_DEV_CAP_FLAG_IBOE))
#define MLX4_INVALID_SLAVE_ID 0xFF
static inline int mlx4_is_master(struct mlx4_dev *dev)
{
return dev->flags & MLX4_FLAG_MASTER;